203 lines
8.3 KiB
EmacsLisp
203 lines
8.3 KiB
EmacsLisp
;;; ob-sh.el --- org-babel functions for shell evaluation
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;; Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; Version: 0.01
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating shell source code.
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;;; Code:
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(require 'ob)
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(require 'shell)
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(eval-when-compile
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(require 'cl))
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(declare-function org-babel-ref-variables "ob-ref" (params))
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(declare-function org-babel-comint-in-buffer "ob-comint" (buffer &rest body))
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(declare-function org-babel-comint-wait-for-output "ob-comint" (buffer))
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(declare-function org-babel-comint-buffer-livep "ob-comint" (buffer))
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(declare-function org-babel-comint-with-output "ob-comint" (meta &rest body))
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(declare-function orgtbl-to-generic "org-table" (table params))
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(defvar org-babel-default-header-args:sh '())
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(defvar org-babel-sh-command "sh"
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"Command used to invoke a shell. This will be passed to
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`shell-command-on-region'")
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(defun org-babel-expand-body:sh (body params &optional processed-params)
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"Expand BODY according to PARAMS, return the expanded body."
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(let ((vars (nth 1 (or processed-params (org-babel-process-params params))))
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(sep (cdr (assoc :separator params))))
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(concat
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(mapconcat ;; define any variables
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(lambda (pair)
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(format "%s=%s"
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(car pair)
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(org-babel-sh-var-to-sh (cdr pair) sep)))
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vars "\n") "\n" body "\n\n")))
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(defun org-babel-execute:sh (body params)
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"Execute a block of Shell commands with org-babel. This
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function is called by `org-babel-execute-src-block'."
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(message "executing Shell source code block")
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(let* ((processed-params (org-babel-process-params params))
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(session (org-babel-sh-initiate-session (nth 0 processed-params)))
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(result-params (nth 2 processed-params))
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(full-body (org-babel-expand-body:sh
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body params processed-params))) ;; then the source block body
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(org-babel-reassemble-table
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(org-babel-sh-evaluate session full-body result-params)
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(org-babel-pick-name (nth 4 processed-params) (cdr (assoc :colnames params)))
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(org-babel-pick-name (nth 5 processed-params) (cdr (assoc :rownames params))))))
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(defun org-babel-prep-session:sh (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(let* ((session (org-babel-sh-initiate-session session))
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(vars (org-babel-ref-variables params))
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(sep (cdr (assoc :separator params)))
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(var-lines (mapcar ;; define any variables
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(lambda (pair)
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(format "%s=%s"
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(car pair)
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(org-babel-sh-var-to-sh (cdr pair) sep)))
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vars)))
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(org-babel-comint-in-buffer session
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(mapc (lambda (var)
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(insert var) (comint-send-input nil t)
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(org-babel-comint-wait-for-output session)) var-lines))
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session))
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(defun org-babel-load-session:sh (session body params)
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"Load BODY into SESSION."
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(save-window-excursion
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(let ((buffer (org-babel-prep-session:sh session params)))
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(with-current-buffer buffer
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(goto-char (process-mark (get-buffer-process (current-buffer))))
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(insert (org-babel-chomp body)))
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buffer)))
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;; helper functions
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(defun org-babel-sh-var-to-sh (var &optional sep)
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"Convert an elisp var into a string of shell commands
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specifying a var of the same value."
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(if (listp var)
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(flet ((deep-string (el)
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(if (listp el)
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(mapcar #'deep-string el)
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(org-babel-sh-var-to-sh el sep))))
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(format "$(cat <<BABEL_TABLE\n%s\nBABEL_TABLE\n)"
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(orgtbl-to-generic (deep-string var) (list :sep (or sep "\t")))))
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(if (stringp var) (format "%s" var) (format "%S" var))))
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(defun org-babel-sh-table-or-results (results)
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"If the results look like a table, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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(org-babel-read
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(if (string-match "^\\[.+\\]$" results)
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(org-babel-read
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(concat "'"
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(replace-regexp-in-string
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"\\[" "(" (replace-regexp-in-string
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"\\]" ")" (replace-regexp-in-string
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", " " " (replace-regexp-in-string
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"'" "\"" results))))))
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results)))
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(defun org-babel-sh-initiate-session (&optional session params)
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"Initiate a session named SESSION according to PARAMS."
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(when (and session (not (string= session "none")))
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(save-window-excursion
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(or (org-babel-comint-buffer-livep session)
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(progn (shell session) (get-buffer (current-buffer)))))))
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(defvar org-babel-sh-eoe-indicator "echo 'org_babel_sh_eoe'"
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"Used to indicate that evaluation is has completed.")
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(defvar org-babel-sh-eoe-output "org_babel_sh_eoe"
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"Used to indicate that evaluation is has completed.")
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(defun org-babel-sh-evaluate (session body &optional result-params)
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"Pass BODY to the Shell process in BUFFER. If RESULT-TYPE equals
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'output then return a list of the outputs of the statements in
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BODY, if RESULT-TYPE equals 'value then return the value of the
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last statement in BODY."
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(if (not session)
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;; external process evaluation
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(save-window-excursion
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(with-temp-buffer
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(insert body)
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;; (message "buffer=%s" (buffer-string)) ;; debugging
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(org-babel-shell-command-on-region (point-min) (point-max) org-babel-sh-command 'current-buffer 'replace)
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(cond
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((member "output" result-params) (buffer-string))
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;; TODO: figure out how to return non-output values from shell scripts
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(t ;; if not "output" then treat as "value"
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(if (member "scalar" result-params)
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(buffer-string)
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(let ((tmp-file (make-temp-file "org-babel-sh"))
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(results (buffer-string)))
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(with-temp-file tmp-file (insert results))
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(org-babel-import-elisp-from-file tmp-file)))))))
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;; comint session evaluation
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(flet ((strip-empty (lst)
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(delq nil (mapcar (lambda (el) (unless (= (length el) 0) el)) lst))))
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(let ((tmp-file (make-temp-file "org-babel-sh"))
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(results
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(cdr (member
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org-babel-sh-eoe-output
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(strip-empty
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(reverse
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(mapcar #'org-babel-sh-strip-weird-long-prompt
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(mapcar #'org-babel-trim
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(org-babel-comint-with-output
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(session org-babel-sh-eoe-output t body)
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(mapc (lambda (line) (insert line) (comint-send-input))
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(strip-empty (split-string body "\n")))
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(insert org-babel-sh-eoe-indicator)
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(comint-send-input))))))))))
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;; (message (replace-regexp-in-string
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;; "%" "%%" (format "processed-results=%S" results))) ;; debugging
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(or (and results
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(cond
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((member "output" result-params)
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(org-babel-trim (mapconcat #'org-babel-trim
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(reverse results) "\n")))
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(t ;; if not "output" then treat as "value"
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(with-temp-file tmp-file
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(insert (car results)) (insert "\n"))
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(org-babel-import-elisp-from-file tmp-file))))
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"")))))
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(defun org-babel-sh-strip-weird-long-prompt (string)
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"Remove prompt cruft from a string of shell output."
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(while (string-match "^% +[\r\n$]+ *" string)
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(setq string (substring string (match-end 0))))
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string)
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(provide 'ob-sh)
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;; arch-tag: 416dd531-c230-4b0a-a5bf-8d948f990f2d
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;;; ob-sh.el ends here
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